The experiments of laser cladding of Ni-base composite alloy powder doped with TiO 2 were carried out. Various laser processing parameters and different TiO 2 content were chosen to obtain a perfect clad layer. The microstructure observation and microhardness test of the cross-section of the laser cladding zone were performed. X-ray diffraction analysis and tribotesting of the surface of the laser coatings were also accomplished. A good finish and crack- and porosity-free surface clad layer was obtained with the TiO 2 content of 3 wt.-%～4 wt.-% at the beam scanning velocity of 2～4 mm/s. An excelled interface between the coatings and the substrate was formed. It is shown that the addition of TiO 2 can enhance the toughness of coatings, refine the microstructure of clad layer, and reduce the cracking susceptibility obviously. The improvement of properties of the laser-clad layer is due to the effect of TiO 2 on it, in which TiO 2 with a proper content can uniformly refine the structural grains, entirely suppress the formations of big nubbly hard-phases, greatly reduce the size of dendritic phases and increase the tenacity of coatings.